Figure 8-3. Adc And Digital Interface - Texas Instruments ADS8688EVM-PDK User Manual

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Figure 8-3 shows the input filter, terminal block, and SMA connections.
AVDD
DVDD
C5
25V
10uF
GND
A0+
A0-
A1+
A1-
A2+
A2-
A3+
A3-
A4+
A4-
A5+
A5-
A6+
A6-
A7+
A7-
R26
49.9
C12
50V
1000pF
R27
49.9
GND
AVDD
C13
100nF
50V
4
J09
1 3
U4
OPA320AIDBVR
R30
1.00k
GND
GND GND
SBAU230C – AUGUST 2014 – REVISED MARCH 2021
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C4
GND
1µF
C6
25V
GND
1µF
25V U1
9 38
AVDD CS
30
AVDD
37
SCLK
34
DVDD
R9
1
SDI
16
49.9
AIN_0P
17 36
AIN_0GND SDO
R16
RST
18 2
AIN_1P RST/PD
19
47.0k
AIN_1GND
R17
3
DAISY
21
47.0k
AIN_2P
20
AIN_2GND
Alt GND
35
DNC
23
AIN_3P
RefSel
22 4
AIN_3GND REFSEL
25 7
AIN_4P REFCAP
24
AIN_4GND
5
REFIO
27
AIN_5P
26
AIN_5GND
R29
6
REFGND
100
12
AIN_6P
13 8
AIN_6GND AGND
28
AGND
14 29
AIN_7P AGND
15 31
AIN_7GND AGND
32 REF
AGND
10
AUX_IN
11 33
AUX_GND DGND
ADS8688IDBT
GND
GND
1
AUX

Figure 8-3. ADC and Digital Interface

Copyright © 2021 Texas Instruments Incorporated
R6
CS
49.9
R7
SCLK_R
49.9
R8
SCLK
49.9
SDI
R10
SDO
49.9
J4
DVDD
RefSel
1 2
RST 3 4
SDI 5 6
CS 7 8
R36
SCLK
9 10
DNP DVDD
SCLK_R
11 12
47.0k
R19
Alt
13 14
GND
SDO 15 16
47.0k
TSW-108-07-G-D
GND
C7 C8 C9
25V 1µF 25V
10uF 25V 22uF
GND
Bill of Materials, Schematics, and Layout
J3 5.5V
2 1
2 1
4 3
4 3
6 5
6 5
RefSel
8 7
8 7
RST 10 9
10 9
12 11
12 11
14 13
14 13
16 15
16 15
SDI
18 17
18 17
20 19
20 19
CS 22 21
22 21
SCLK 24 23
24 23
26 25
26 25
SCLK_R
28 27
28 27
30 29
30 29
32 31
32 31
34 33
34 33
Alt 36 35
36 35
SDO
38 37
38 37
40 39
40 39
42 41
42 41
44 43
44 43
46 45
46 45
48 47
48 47
R18
WP
50 49
DVDD 50 49
52 51
0
52 51
54 53
54 53
SDA 56 55
56 55
SCL 58 57
58 57
60 59
60 59
ID_PWR
MP1 MP3
GND GND
MP2 MP4
GND GND
QTH-030-01-L-D-A-K-TR
GND
GND
ADS8688EVM-PDK Evaluation Module 21